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A heartbroken Bi-Kwang continues his journey, without his companion at his side. Armed with a set of new friends - who serve only to erase Hwa-Rin from his memories - Bi-Kwang encounters the powerful Son of the Thunder, and unsurprisingly, manages to make an enemy of the explosives expert. His life is once again threatened, as new friends become fearsome enemies and challenges transform into the impossible for Bi-Kwang, the man who is destined to become The Ruler of the Land.